Mitsubishi Electric MELSEC-A/QnA Series User Manual

7 POSITIONING MODULE REPLACEMENT
7 - 20
7.4.5 Interface specifications comparison with external devices
For the external interface specifications, the following shows the differences between AD75P-S3 and
QD75PN/QD75DN.
*1 For the external start and in-position signal of which QD75PN/QD75DN does not have, they are not described.
*2 The column of interface specifications differences is described as the form, [Specifications of AD75P-S3] 
[Specifications of QD75PN/QD75DN].
*3 The response time difference (0.2 ms) of AD75P-S3 and QD75PN/QD75DN is the time difference of 1pls part for
creep speed of 5000pps.
When the accuracy is required, it is required for the creep speed to be low enough value.
*4 If the chattering time is long when the near-point watchdog signal is turned on, the OFF status may be detected shortly
after the ON status of the signal is detected (under changing into the creep speed). In this case, the QD75PN/QD75DN
outputs an error and stops the OPR control.
: Compatible, : Partial change required
Item
*1
Differences as Interface specifications
*2
Compat-
ibility
Precautions for replacement
Input
Drive unit READY -
Upper/lower limit signal -
Stop signal -
Near-point dog signal
Input resistance: 4.7k4.3k
Response time: 4ms  1ms
<When the machine OPR for the
near-point watchdog signal method is
used>
The input response time for the
QD75PN/QD75DN is shorter
than the A1SD75P-S3.
If a sensor, which the chattering time
when the near-point watchdog signal
is turned on is long, is used, an error
may occurs due to the false detection
of the ON/OFF status.
*4
Check specifications for the sensor.
Speed-position switching signal
Input resistance: 4.7k7.7k
Response time: 4ms  1ms
Zero signal
Input resistance: 3.5k4.7k(at input of
24V)
0.5k0.62k(at input of 5V)
Response time: 0.8ms1ms
*3
ON voltage : 2.5V2.0V (at input of 5V)
Including the response time
differences, reconfirming is required.
Manual pulse generator ON current: 3.5mA2mA
Output
Pulse -
Deviation counter clear -

Mitsubishi Electric MELSEC-A/QnA Series Specifications

General

Brand	Mitsubishi Electric
Model	MELSEC-A/QnA Series
Category	Controller
Language	English